Copy this file to the Logic folder in the Application Support folder. If there's existing ratings and tags information on this Mac, you're asked if you want to replace the existing file.

This step overwrites the ratings and user tags on this Mac with the data from your original Mac. Make sure you have a backup of your ratings and tags data or that you don't need them before you proceed. If you're sure you want to replace the ratings and tags data on this Mac, click Replace when prompted.

Open Logic, then open an instance of Alchemy.

Choose Refresh Library from the File menu in Alchemy to see your ratings and tags appear.